spring constellations

autumn constellations

not visible constellations

summer constellations

winter constellations

constellations of the zodiac

The autumn constellations are the particularly visible constellations in autumn when from the end of the summer. Andromeda is an autumn constellation, smaller than its neighbor Pegasus, it is it who contains the galaxy the closest to the Earth and it is in autumn when we observe best this constellation. The autumn sky is dominated by the

During the autumnal season, we can be guided by the big square formed by the constellation of Pegasus to turn among stars. The constellation of Pegasus is except the Milky Way and that is why its stars get loose so sharply on the dark sky. The most brilliant star of Pegasus has for name Markab (α Peg of magnitude 2,51 to 139,62 AL) and it is situated on the right lower corner of the big heavenly square. Other stars of the constellation of Pegasus are Schedar (β Peg of magnitude 2,46 to 199,24 AL), Enif (ε Peg of magnitude 2,40 to 672,49 AL), Biham (θ

Peg of magnitude 3,54 to 96,58 AL), Algenib (γ Peg of magnitude 2,85 to 333,16 AL), Matar (η Peg of magnitude 2,95 to 214,86 AL). This constellation owes its name to Pegasus, the winged horse of the Greek mythology. it is connected with the legend of Andromeda. It was listed from Ier century later J.C. By Ptolémée in its Almageste and cataloged by William Herschel in 1783. The big square is a major mark of the sky, which recognizes directly in its shape, and in the absence of significant star in its perimeter.   see

If we pursue an imaginary line leaving the star situated in the left superior corner of the square of Pegasus and what we go eastward, we arrive then on the constellation of Andromeda. This constellation contains in fact brilliant 3 stud whose names are of Arabic origin. It is about Alpheratz, about Mirach and about Almach. Almach is a beautiful double star in colors contrasted by orange and by blue. As for Mirach, it will help the observer to find a beautiful galaxy, if he pursues from this star an imaginary line towards the northwest.

This galaxy, Messier 31, is situated in more than 2 million light years of us. We can also perceive it in the bare eye on the very clear nights.
The constellation finds a way from Algol and from the big square of Pegasus. Leaving this square, we see being outlined an immense 'wagon', three times as big as that of the Great Bear, a formed by  And, α And, α, β, et λ Peg (the Big square of Pegasus), then in the continuation of its diagonal, from α And, β And, γ And, and finally Algol (β Persei).   see

the adaptation which leaves the Big square of Pegasus and goes back up along the diagonal of Andromeda until Algol de Perseus and Capella of the Coachman. Conversely, we can leave Capella, the most brilliant star of the region, and track down its neighbors Algol (β Per) and Mirfak (α Per) in the direction of the West. We can also find a way with regard to Cassiopeia, by following the adaptation of the median bar of its "W" in the direction of the Southeast, the adaptation which falls on Mirfak (α Per). We can finally go back up the adaptation which leaves Rigel in Orion, pass by Aldébaran of the bull, and falls on Algol (β Per) before joining Cassiopeia in the axis of the right hand of its "W".   see

The constellation of the Triangle is under the constellation of Andromeda and the southeast side of Perseus. Three little brilliant stars of this small constellation form a sort of lengthened triangle. The main star is a dwarf situated in 64 light years of us. Furthermore, the Triangle contains a completely remarkable heavenly object. It is about the big spiral nebula Messier 33. It is a galaxy named quite justly Galaxy of the Triangle that we can observe in the bare eye on the very clear nights. That is about the third biggest galaxy of our local Group, being

two others the Milky Way and the Galaxy of Andromeda. This constellation also accommodates the nebula NGC 604 (situated in M33), the biggest region of ionized hydrogen that we know, of a diameter of 1500 years light, the opened heap C 0147+270, the spiral galaxy NGC 925 as well as NGC 672 and IC about 1727, two distant galaxies 18 million years light, but separated by only 88000 years light. The quasar 3C 48, in the North of the constellation, was one of the first ones to have been discovered.
  see